Tag: Kuiper Belt

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New Horizons mission extended to Kuiper Belt

Image: New Horizons
Artwork shows New Horizons flying by a Kuiper Belt object known as 2014 MU69. (Credit: NASA)

Almost a year after New Horizons’ unprecedented flyby of Pluto, NASA has given the official go-ahead for the probe to fly past another icy object in the Kuiper Belt in 2019.

At the same time, the space agency decided to keep the Dawn spacecraft in orbit around the dwarf planet Ceres, rather than sending it out to another asteroid known as Adeona.

The decisions are part of NASA’s process for extending its planetary missions into the 2017-2018 time frame.

New Horizons’ extension means that mission operations will be supported as the piano-sized probe makes its way toward a Kuiper Belt object called 2014 MU69. The object was detected in 2014 during a Hubble Space Telescope search for post-Pluto targets that could be reached by New Horizons. The mission team already has been maneuvering the spacecraft in preparation for a flyby on Jan. 1, 2019.

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Solar system’s most distant world detected

Image: Kuiper Belt object
An artist’s conception shows an object in the distant Kuiper Belt. The newly reported object is beyond the Kuiper Belt, in a region known as the inner Oort Cloud. (Credit: G. Bacon / STScI / NASA)

Astronomers say they’ve identified the most distant celestial object in our solar system – a speck of light more than three times farther out than Pluto, called V774104.

The object is smaller than Pluto or Eris, which rank as the largest known worlds beyond Neptune with diameters of a little less than 1,500 miles (2,400 kilometers). V774104’s brightness suggests that it’s just 300 to 600 miles (500 to 1,000 kilometers) wide. But based on a limited number of observations by the Subaru Telescope in Hawaii, astronomers estimate its distance at more than 9.5 billion miles, or 103 times the distance between the sun and Earth.

The sun-Earth distance, known as an astronomical unit or AU, provides the best measuring stick for distant objects in the solar system. Pluto is currently 33 AU from the sun, and Eris’ distance is 96 AU. V774104 is farther out, in a twilight zone that’s between the belt of icy material called the Kuiper Belt and a halo of comets called the Oort Cloud.

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Universe Today

New Horizons mission picks post-Pluto target

Image: New Horizons and KBO
An artist’s conception shows the New Horizons spacecraft flying past a Pluto-like object in the Kuiper Belt, the ring of icy material that lies billions of miles away from the sun. (Credit: Alex Parker / NASA / JHUAPL / SwRI)

NASA and the science team behind the New Horizons mission to Pluto and beyond have settled on the popular choice for the spacecraft’s next flyby: It’s 2014 MU69, an icy object a billion miles beyond Pluto that’s thought to be less than 30 miles (45 kilometers) wide.

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